Mathematics, 18.06.2021 08:40 myla18jabbar

Cho hàm số f (x, y)= $\frac{2x^{2} +y^{2} }{xy}$ a) Tính vi phân cấp 1 của hàm số tại
b) Tính các đạo hàm riêng cấp 2 của hàm số tại
c) Chứng minh rằng không tồn tại $\lim_{(x,y) \to \ (0,0)} f (x,y)$

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Cho hàm số f (x, y)= a) Tính vi phân cấp 1 của hàm số tại
b) Tính các đạo hàm riêng cấp 2 c...

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Cho hàm số f (x, y)= a) Tính vi phân cấp 1 của hàm số tại b) Tính các đạo hàm riêng cấp 2 của hàm số tại c) Chứng minh rằng không tồn tại

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Cho hàm số f (x, y)= $\frac{2x^{2} +y^{2} }{xy}$ a) Tính vi phân cấp 1 của hàm số tại
b) Tính các đạo hàm riêng cấp 2 của hàm số tại
c) Chứng minh rằng không tồn tại $\lim_{(x,y) \to \ (0,0)} f (x,y)$